Thermostat Housing Gasket 14-20 Hemi 6.4L

The Thermostat Housing Gasket 14-20 Hemi 6.4L is a critical OEM-specification seal engineered for Dodge and Jeep platforms equipped with the legendary 6.4-liter HEMI V8 engine. This gasket sits between the thermostat housing and cylinder head, maintaining a watertight seal in one of the engine bay's highest-temperature zones. Whether you're rebuilding a stock engine, addressing coolant seepage, or performing preventative maintenance on your truck or Jeep, this gasket is essential to reliable cooling system integrity and long-term engine durability.

Manufactured by MAHLE ORIGINAL/CLEVITE, a trusted name in OEM gasket technology, the C33717 is precision-cut from durable elastomer and metal-composite materials designed to withstand the thermal cycling and pressure demands of modern HEMI performance. The 14-20 model year range covers a wide compatibility window, ensuring exact fitment across multiple generations of Dodge Ram, Jeep Wrangler JL, and Gladiator platforms. Unlike cheap aftermarket alternatives, this gasket maintains its seal integrity across ambient temperatures from cold starts to sustained highway driving, preventing the slow coolant weeps that compromise engine temperature regulation.

Experienced HEMI owners and professional mechanics choose this gasket for routine coolant system service, timing cover work, and full engine rebuilds. Installation is straightforward for anyone familiar with basic engine disassembly—the compact 4.9 x 7.3-inch form factor requires minimal workspace. Always pair this gasket with fresh coolant and verify proper torque specs on the housing bolts to avoid future leaks. This is genuine OEM-grade engineering at a tactical price point.